ECG of the Month:Changing Morphology of a Wide-QRS Tachycardia.

Abstract

An obese 49-year-old man with a history of systemic arterial hypertension, diabetes mellitus, dyslipidemia, three myocardial infarcts, an ischemic cardiomyopathy, a four-vessel coronary artery bypass operation 7 years earlier, and implantation of a cardioverter-defibrillator 2 years earlier comes to the hospital with palpitations and dyspnea. An ECG is recorded.